From edebe024cbe8406cdf191cefe111683d0c2849ea Mon Sep 17 00:00:00 2001
From: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
Date: Thu, 11 Jan 2024 19:08:49 -0800
Subject: [PATCH] Accept multiline quoted annotations (#16765)

See discussion in
https://discuss.python.org/t/newlines-within-triple-quoted-type-expressions/42833
---
 mypy/fastparse.py               |  2 +-
 test-data/unit/check-basic.test | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/mypy/fastparse.py b/mypy/fastparse.py
index 13b9b5c8a871..b3e0fc70a9d6 100644
--- a/mypy/fastparse.py
+++ b/mypy/fastparse.py
@@ -318,7 +318,7 @@ def parse_type_string(
     string expression "blah" using this function.
     """
     try:
-        _, node = parse_type_comment(expr_string.strip(), line=line, column=column, errors=None)
+        _, node = parse_type_comment(f"({expr_string})", line=line, column=column, errors=None)
         if isinstance(node, UnboundType) and node.original_str_expr is None:
             node.original_str_expr = expr_string
             node.original_str_fallback = expr_fallback_name
diff --git a/test-data/unit/check-basic.test b/test-data/unit/check-basic.test
index 61a7160ce4f4..7a426c3eca9f 100644
--- a/test-data/unit/check-basic.test
+++ b/test-data/unit/check-basic.test
@@ -502,3 +502,19 @@ s2: str = 42  # E: Incompatible types in assignment (expression has type "int",
 s3: str = 42  # E: Incompatible types in assignment (expression has type "int", variable has type "str")
 [file c.py]
 s3: str = 'foo'
+
+[case testMultilineQuotedAnnotation]
+x: """
+
+   int |
+   str
+
+"""
+reveal_type(x)  # N: Revealed type is "Union[builtins.int, builtins.str]"
+
+y: """(
+    int |
+    str
+)
+"""
+reveal_type(y)  # N: Revealed type is "Union[builtins.int, builtins.str]"